KNSB FIDE
PK

Piet Kooiman

Rated since January 2023

1893 Classic
1879 Rapid
1879 Blitz

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
HOF VAN DEN, J. (JESSE) 1952
9647 SOS Competitie 2024/2025 2024-10 · Wednesday 11 September 2024
REMKES, M.N.J. (MAARTEN) 1929
9650 SOS Competitie 2024/2025 2025-01 · Monday 6 January 2025
WALLACE, G. (GAVIN) 1920
12778 SOS competitie 2025/2026 Lijst 1 juni · Friday 8 May 2026
BLOK, R.A. (RONALD) 1839
10472 Tata Steel Chess Tournament 2026 Dagvierkampen · Tuesday 20 January 2026
VERSTEGE, V. (VINCENT) 1827
8102 SOS Competitie 2023/2024 Mei 2024 · Friday 24 May 2024
Worst losses
HILARIUS, S. (SANDER) 1763
6419 Tata Steel Chess Tournament 2023 Dagvierkampen · Monday 16 January 2023
FLIERMAN, E.R.P. (EDWIN) 1764
6419 Tata Steel Chess Tournament 2023 Dagvierkampen · Wednesday 18 January 2023
HASPELS, J.J.D. (JOHAN) 1799
11993 KNSB competitie 2025-2026 Klasse 4 ronde 2 · Saturday 4 October 2025
STEIJN VAN, L.C.J. (HANS) 1853
5713 SOS Competitie 2022/2023 Februari 2023 · Tuesday 7 February 2023
CORTENBACH, S. (STAN) 1875
8275 Tata Steel Chess Tournament 2024 Dagvierkampen · Wednesday 17 January 2024
Tata Steel Chess Tournament 2026 Dagvierkampen Friday 16 January 2026 +2–0=1 +23.4
Tata Steel Chess Tournament 2025 Dagvierkampen Friday 17 January 2025 +1–1=1 -14.0
Tata Steel Chess Tournament 2024 Dagvierkampen Friday 12 January 2024 +1–1=1 +3.1
Tata Steel Chess Tournament 2023 Dagvierkampen Friday 13 January 2023 +0–2=1 -29.3
KNSB competitie 2025-2026 Klasse 4 ronde 2 Saturday 20 September 2025 +0–1=0 -14.8
SOS competitie 2025/2026 Lijst 1 juni Monday 1 September 2025 +1–0=0 +13.9
SOS competitie 2025/2026 Lijst 1 mrt Monday 1 September 2025 +0–0=1 +7.4
SOS competitie 2025/2026 Lijst 1 feb Monday 1 September 2025 +0–0=1 -1.8
SOS competitie 2025/2026 Lijst 1 jan Monday 1 September 2025 +0–0=1 +0.8
SOS competitie 2025/2026 Lijst 1 Dec Monday 1 September 2025 +0–0=1 +2.7
SOS competitie 2025/2026 Lijst 1 Nov Monday 1 September 2025 +0–0=1 -3.3
12e Best of the West Groep A, rondes 6 en 7 Saturday 28 September 2024 +0–1=1 -14.6
12e Best of the West Groep A, ronde 5 Saturday 28 September 2024 +0–0=1 -3.6
12e Best of the West Groep A, ronde 4 Saturday 28 September 2024 +0–0=1 -4.1
12e Best of the West Groep A, rondes 1 en 2 Saturday 28 September 2024 +1–1=0 -3.5
SOS Competitie 2024/2025 2025-05 Sunday 1 September 2024 +0–2=0 -25.7
SOS Competitie 2024/2025 2025-03 Sunday 1 September 2024 +0–1=1 -2.3
SOS Competitie 2024/2025 2025-02 Sunday 1 September 2024 +0–1=0 -12.1
SOS Competitie 2024/2025 2025-01 Sunday 1 September 2024 +1–0=0 +12.5
SOS Competitie 2024/2025 2024-11 Sunday 1 September 2024 +0–0=1 -3.4
SOS Competitie 2024/2025 2024-10 Sunday 1 September 2024 +3–0=0 +32.8
11e Best of the West Groep A, ronde 7 Saturday 23 September 2023 +1–0=0 +9.3
11e Best of the West Groep A, ronde 5 Saturday 23 September 2023 +0–0=1 +4.7
11e Best of the West Groep A, ronde 4 Saturday 23 September 2023 +0–0=1 -2.0
11e Best of the West Groep A, ronde 2 Saturday 23 September 2023 +1–0=0 +6.0
11e Best of the West Best of the West, Groep A, ronde 1 Saturday 23 September 2023 +0–0=1 -6.0
KNSB competitie 2023-2024 KNSB Beker 2023-2024 ronde 3 Saturday 16 September 2023 +0–1=0 -2.2
KNSB competitie 2023-2024 Klasse 5 ronde 5 Saturday 16 September 2023 +0–1=0 -8.3
SOS Competitie 2023/2024 Mei 2024 Friday 1 September 2023 +1–0=0 +10.5
SOS Competitie 2023/2024 April 2024 Friday 1 September 2023 +1–0=0 +8.8
SOS Competitie 2023/2024 Maart 2024 Friday 1 September 2023 +0–1=0 -8.6
SOS Competitie 2023/2024 Februari 2024 Friday 1 September 2023 +1–0=0 +12.8
SOS Competitie 2023/2024 November 2023 Friday 1 September 2023 +0–1=0 -5.5
SOS Competitie 2023/2024 Oktober 2023 Friday 1 September 2023 +1–0=0 +13.7
SOS Competitie 2022/2023 Mei Monday 12 September 2022 +1–0=0 +7.9
SOS Competitie 2022/2023 April 2023(HK) Monday 12 September 2022 +0–0=1 -3.2
SOS Competitie 2022/2023 Maart 2023(HK) Monday 12 September 2022 +0–1=0 -9.3
SOS Competitie 2022/2023 Februari 2023 Monday 12 September 2022 +0–1=0 -10.9

Team Competition

Current teams
Oud Zuylen Utrecht 1
Klasse 4C · 2025-2026 · 1 game
OZU 1
HKD · 2025-2026 · 6 games
Past teams
OZU 1
HKB · 2024-2025
OZU 2
2E · 2024-2025
Oud Zuylen Utrecht 1
HKB · 2023-2024
Oud Zuylen Utrecht 3
Klasse 5E · 2023-2024
OZU 1
HKB · 2022-2023
Oud Zuylen Utrecht 1
Klasse 3C · 2021-2022
OZU 1
HKB · 2021-2022

Rating History

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Peak Ratings

Classic 1933 Nov. 1, 2024
Rapid 1879 March 1, 2026
Blitz 1879 March 1, 2026

Games

Wins 17
Losses 17
Draws 18
Win Rate 33%

Performance by Color

Color Wins Draws Losses Win Rate
White 9 9 4 41%
Black 8 9 13 27%

Recent Matches

Wallace, G. (Gavin) (1920) Friday 8 May 2026 WIN +13.9
Ercan, S. (Selman) (2107) Tuesday 3 February 2026 DRAW +7.4
WCM Zutphen van, A. (Amy) (1818) Wednesday 21 January 2026 WIN +11.4
Blok, R.A. (Ronald) (1839) Tuesday 20 January 2026 WIN +12.1
Houpst, C.H.J. (Christiaan) (1847) Monday 19 January 2026 DRAW -0.1
Tooren van, B.F. (Bart) (1797) Tuesday 13 January 2026 DRAW -1.8
Hamers, G.J. (Gerard) (1874) Tuesday 2 December 2025 DRAW +0.8
Dissel, H. (Henk) (1924) Tuesday 4 November 2025 DRAW +2.7
Geesing, J. (Joost) (1770) Monday 6 October 2025 DRAW -3.3
Haspels, J.J.D. (Johan) (1799) Saturday 4 October 2025 LOSS -14.8
Schoffelmeer, F. (Frans) (1932) Saturday 14 June 2025 LOSS -10.7
Groeneveld, J. (Henry) (1792) Saturday 31 May 2025 DRAW -3.9
Schepers, J. (Jan) (1912) Friday 23 May 2025 LOSS -12.3
Stok, J. (Joris) (1879) Tuesday 13 May 2025 LOSS -13.4
Beverdam, F. (Frank) (1812) Saturday 29 March 2025 DRAW -3.6
Roering, P.W.E. (Ed) (2146) Monday 17 March 2025 DRAW +7.2
Oosterlaken, E. (Ed) (2001) Tuesday 11 March 2025 LOSS -9.6
Buzink, C.M.L. (Maurice) (1794) Saturday 1 March 2025 DRAW -4.1
Bilt van der, W. (Wouter) (1939) Tuesday 4 February 2025 LOSS -12.1
Calverley, Jonathan Wednesday 22 January 2025 WIN